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The annual demand for a product is 64,000 items and the holding cost is $0.50 item/year. 1) What will be the Economic Order Q
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Answer #1

ANNUAL DEMAND = 64000
ORDERING COST = 250
HOLDING COST = 0.5

EOQ = SQRT(2 * ANNUAL DEMAND * ORDERING COST / HOLDING COST PER UNIT) = SQRT(2 * 64000 * 250 / 0.5) = 8000

2. REORDER POINT = DAILY DEMAND * LEAD TIME = (64000 / 300) * 9 = 1920

3. SAFETY STOCK = 150
STDEV OF DEMAND = 40
LEAD TIME = 9

Z = SAFETY STOCK / (STANDARD DEVIATION * SQRT(LEAD TIME)) = 150 / (40 * SQRT(9)) = 1.25
SERVICE LEVEL FOR A Z VALUE OF 1.25 = 0.894350226333145 OR 89%

4. DEMAND = 213.333333333333
STANDARD DEVIATION OF DEMAND = 40
SERVICE LEVEL = 98, WHICH GIVES A Z VALUE OF 2.05
LEAD TIME = 9
REORDER POINT = DEMAND * LEAD TIME + SAFETY STOCK
SAFETY STOCK = Z * STANDARD DEVIATION OF DEMAND * SQRT(LEAD TIME)

SAFETY STOCK = 2.05 * 40 * SQRT(9) = 246

REORDER POINT = (213.333333333333 * 9) + 246 = 2166

HOLDING COST OF SS = 246 * .5 = $123 FOR EACH ORDER
NO. OF ORDERS = ORDER FREQUENCY = DEMAND / EQQ = 64000 / 8000 = 8
= 123 * 8 = $984

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